Coke oven with improved end joint



P 4, 1956 .L VAN ACKEREN OKE OVEN WITH IMPROVED END JOINT 5 Sheets$heet 1 Filed April 1, l953 INVENTOR. JOSEPH VAN ACKEREA/ w m W a 7- T'ORA/E 76 his COKE OVEN WITH IMPROVED END JOINT 3 Sheets-Sheet 2 Filed April 1, 1953 m T NA 1N w W m J MM).M

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United States Patent COKE OVEN WITH IMPROVED END JOINT Joseph Van Ackeren, Pittsburgh, Pa., assignor to Koppers Company, Inc., a corporation of Delaware Application April 1, 1953, Serial No. 346,081

6 Claims. (Cl. 202-223) The present invention relates to regenerative coke ovens and more particularly to an improved end joint for regenerator division walls of regenerative coke ovens.

In the prior art, regenerative coke oven batteries have their side-by-side regenerator chambers separated by horizontally elongated silica regenerator division walls. Each of these side-by-side chambers are closed at their opposite ends by regenerator face walls made of clay. The silica division walls extend cross-wise the battery, and the end faces of each wall are exposed to the atmosphere. Positioned between successive regenerator division walls are clay face walls which are used to close the opposite ends of each regenerator chamber. The opposite ends of each of these clay face walls abut against opposing sides of successive regenerator division walls to form joints therewith. Since the end faces of the regenerator division walls are left exposed to the atmosphere, the temperature at the ends of the walls will vary with the temperature of the intermediate portions of the walls when the battery is in operation. This temperature variance occasionally results in the formation of fissures at the ends of the regenerator division walls. Further fissures may also form at the wall ends due to cumulative expansion at these points resulting from the heating of the walls and due to variations in temperatures resulting from the cyclic onofi operation of adjacent regenerator chambers.

One of the features of the present invention is to provide an improved and inventive end joint for said regenerator division walls wherein the end faces of said walls are shielded from the atmosphere.

Another feature of the present invention is to provide an improved and inventive end joint that forms a leakproof seal between adjacent regenerator chambers regardless of any interstices that may develop in the end faces of the regenerator division walls.

A further feature of the present invention is to provide a constant sealing arrangement at the end joints of the regenerator division walls regardless of expansions and contractions of the regenerator division walls. I

Another feature of the present invention is to provide a sealing arrangement which will prevent gas infiltration between the atmosphere and the regenerator chambers.

Another feature of the present invention is to provide seal members for said end joints which can be held tightly in place regardless of the temperature changes in the oven battery.

More particularly the present invention provides in a regenerative coke oven batterey having at least one pair of side by side regenerator chambers in which the gas pressure may be difierent, said chambers being separated by a horizontally elongated regenerator division wall and each being closed at its opposite ends by regenerator face walls; an improved end joint for said regenerator division wall comprising a face wall for one of said separated chambers arranged to cooperate with the corresponding face wall of the other separated chamber to overlap at least a substantial portion of the end face of said regenerator division wall whereby said end face of ice 2' the division wall is subjected to a minimum atmospheric exposure.

Reference will now be made to the accompanying drawings which illustrate and exemplify the embodiment of an apparatus in a preferred type of construction.

Fig. 1 is a partially broken elevational view of a regenerative coke oven.

Fig. 2 is a cross-sectional elevational view of the re: generator chambers of the regenerative coke oven taken on the line IIII of Fig. 1 with an outline of the buck stays imposed on this view.

Fig. 3 is a sectional view taken along the line HI-III of Fig. 1.

Fig. 4 is a sectional view taken along the line IV-IV of Fig. 1.

Fig. 5 is a sectional view taken along the line V-V of Fig. 2.

Fig. 6 is a sectional view taken thru the joint of a regenerator division wall.

With reference to the accompanying drawings, a preferred apparatus of the present invention is now described. Although the preferred embodiment discloses a regenerative oven having regenerator curtain or partition walls under alternate ovens, it is obvious that the proposed invention may be applied to various other regenerator are rangements.

Referring now to the drawings, the regenerator chamber 2 of coke oven 1 is shown bounded on either side by the regenerator division walls 4 (Fig. 2) which extend horizontally across the battery. The regenerator chambers 2 are shown bounded on one side by the regenerator divisional wall 4 and on the other side by the regenerator curtain or partition divisional wall 4'. These regenerator chambers are positioned below the oven floor 14 (Fig. 1) and are furnished with checker-brick 34, as is well known in the art, the bottom of the oven floor forming a top' boundary for the chambers. Positioned directly below the regenerator chamber 2 are the sole fiue channels 10 and positioned directly below the regenerator chambers 2' are the sole flue channels 10'. As is well known in the art and not shown in the disclosed drawings, the sole flue channels are constructed to be in communication with their respective regenerator chambers above. X,

The regenerator division walls 4 and 4' are made up of silica brick which is used almost exclusively in the construction of modern coke ovens. Each of the regenerator chambers 2 is bounded on its opposite ends by the vertically disposed face walls 12 and each of the regenerator chambers 2 is bounded on its opposite ends by the vertically disposed face walls 12'. As may be noted from the drawings, only one end of the regenerator chambers is shown. The regenerator face walls 12 and 12' are made from a well known fire clay material. The face walls are provided with insulating material 32 which can be an asbestos-like material, such as vermiculite, with a binder of diatomaceous silica blended with other insulated materials and bonded with asbestos fibers.

As can be seen in Fig. 4 of the drawings, each of the facing walls 12 and 12' have cut-away portions 28 at either end of the side that faces the regenerator chambers. These cut-away portions allow the inner side of each of the regenerator facing walls 12 and 12 to project inwardly between opposite sides of adjacent regenerator division walls 4 and 4', the ends of the clay facing walls each overlapping a portion of the end face of the regenerator division walls 4 and 4.

It is to be noted that this cut-away arrangement serves as an additional means for preventing the passage of gases from one regenerator chamber to an adjacent regenerator chamber.

The clay facing walls overlap the faces of the silica regenerator walls in such a way that spaces 11 and 11 are.

formed in front of the end faces of the regenerator division walls 4 and 4' respectively. Grooves 13 and 13' are formed in-the end faces of the regenerator division walls 4 and 4' respectively, the grooves corresponding in width and cooperating with the spaces 11 and 11 to re ceive steel sealing plates 16 and 16' respectively. The grooves 13 and 13', should be sufficiently deep to give a good sealing effect without weakening the regenerator division wall end faces and are preferablybetween 4" and in depth.

Positioned on the buck stays 22 and 22' which are located on the outer sides of the facing walls 12 and 12 are the screw blocks 20 and 20 respectively. The screw blocks may be welded to the buck stays or fastened by means of bolts or in other suitable manner. The screw blocks and 20 carry the adjusting screws 18 and 13' respectively which screws are connected to the steel sealing plates 16 and 16 respectively. By appropriately turning these screws during the operation of the oven, the sealing plates 16 and 16' may be held fast against the end faces of the regenerator division walls 4 and 4' respectively.

It would be obvious to those skilled in the art that in place of the adjusting screws, spring members or spring members combined with adjusting screws can be used to constantly retain the sealing plates firmly against the end faces of the regenerator division walls.

Asbestos rope packings 2 2 and 24 can be inserted in the grooves 13 and 13' respectively, surrounding the steel seal plates in order to assure further sealing at the end joints of the regenerator division walls. Additional asbestos rope packings 25 and 25' can be inserted in the grooves 11 and 11' respectively surrounding the steel seal plates, in order to seal ofi these grooves from the atmosphere and further assure protection of the end faces of each of the regenerator division walls.

As shown in Fig. 4 of the drawings, the clay regenerator facing walls 12 and 12 are provided with face plates or protecting shells 31 and 31' respectively having flanged edges 33 and 33' respectively. These face plates which can be of steel or other suitable material prevent gas infiltration between the regenerator chambers and the atmosphere and the flanged edges permit better packing conditions.

As may clearly be seen in Fig. 5 of the drawing, wedges 39 are driven into the space above each of the regenerator face walls as the brick work expands during the heatingup period. This space is filled with cement and packed with asbestos ropes after the heating-up period.

As clearly shown in Fig. 6 of the drawings, the openings 38 between the ends of the steel plates 16 and the lower portion of the oven floor 14 are packed with asbestos ropes 40 after the regenerator chambers are heated. This packing seals off these upper openings.

It will be realized from the foregoing that the various elements described cooperate in a novel manner to provide results heretofore unobtained. For example, the ends of regenerator division walls are protected from temperature variations thus retarding or preventing the formation of fissures which allows gas leakage between adjacent regenerator chambers or betweena regenerator chamber and the atmosphere. Additionally, the sealing plates and the cut-away structure of the face walls serve to prevent passage of gases between adjacent regenerator chambers or between a regenerator chamber and the atmosphere.

It will be obvious to those skilled in the art that various modifications can be made in the present apparatus in addition to those enumerated hereinabove without departing from the spirit and scope of the invention, and it is intended to cover in the claims such modifications as are included within the scope thereof.

The invention claimed is: a

1. In a regenerative coke oven battery having buck stays and at least one pair of side-by-side regenerator chambers in which the gas pressure may be different, said chambers being separated by va horizontally elongated silica regenerator division wall and each being closed at its opposite ends by clay regenerator end face walls, at least one end of each of said chambers being closed from the atmosphere by a clay end face wall having an atmosphere side and a regenerator chamber side; an improved end joint for said silica regenerator division wall at that end of the division wall adjacent the ends of the regenerator chambers closed from the atmosphere comprising .a clay end face wall for one of said pair of separated chambers arranged to have the regenerator chamber side thereof partially overlap the end face of said silica regenerator division wall, a corresponding clay end face wall for the other of the pair of separated chambers have theregenerator chamber side thereof partially overlap at least a substantial portion of the remainder of the end face of said silica regenerator division wall so that the two substantially overlap the end face of said division wall, said clay end face walls having their ends spaced from each other to form an opening therebetween, and sealing means positioned in said opening between said ends of said clay face walls, said sealing means contacting the end face of the silica regenerator division wall to seal off the corresponding ends of the side-by-side regenerator chambers from each other. i

2. The apparatus of claim 1, said sealing means including a seal plate and a screw actuated member mounted on the buck stays of said regenerative oven contacting said seal plate to urge said seal plate tightly against the end face of said silica regenerator division Wall.

3. The apparatus of claim 2, said 'silicaregenerator division wall 'end face having an aperture therein cooperating with the opening between the ends of said clay end face walls to receive said seal plate.

4. The apparatus of claim 3 and packing in said aperture surrounding a portion of said seal plate to further insure sealing and to shield the end face of said regenerator division wall from the atmosphere. I

5. The apparatus of claim 4 and a protecting shell on the outer atmosphere side of at least one of said end face walls to prevent infiltration from either side thereof.

6. The apparatus of claim 5, said protecting shell having flanged ends adapted to fit around a portion of the ends of the end face wall to provide for better packing conditions. 7

References Cited in the file of this patent UNITED STATES PATENTS 1,430,027 Plantinga Sept. 26, 1922 2,098,013 Pavitt Nov. 2, 1937 2,376,718 Otto May 22, 1945 2,665,242 Otto Jan. 5, 1954 

1. IN A REGENERATIVE COKE OVEN BATTERY HAVING BUCK STAYS AND AT LEAST ONE PAIR OF SIDE-BY SIDE REGENERATOR CHAMBERS IN WHICH THE GAS PRESSURE MAY BE DIFFERENT, SAID CHAMBERS BEING SEPARATED BY A HORIZONTALLY ELONGATED SILICA REGENERATOR DIVISION WALL AND EACH BEING CLOSED AT ITS OPPOSITE ENDS BY CLAY REGENERATOR END FACE WALLS, AT LEAST ONE END OF EACH OF SAID CHAMBERS BEING CLOSED FROM THE ATMOSPHERE BY A CLAY END FACE WALL HAVING AN ATMOSPHERE SIDE AND A REGENERATOR CHAMBER SIDE: AN IMPROVED END JOINT FOR SAID SILICA REGENERATOR DIVISION WALL AT THAT END OF THE DIVISION WALL ADJACENT THE ENDS OF THE REGENERATOR CHAMBERS CLOSED FROM THE ATMOSPHERE COMPRISING A CLAY END FACE WALL FOR ONE OF SAID PAIR OF SEPARATED CHAMBERS ARRANGED TO HAVE THE REGENERATOR CHAMBER SIDE THEREOF PARTIALLY OVERLAP THE END FACE OF SAID SILICA REGENERATOR DIVISION WALL, A CORRESPONDING CLAY END FACE WALL FOR THE OTHER OF THE PAIR OF SEPARATED CHAMBERS HAVE THE REGENERATOR CHAMBER SIDE THEREOF PARTIALLY OVERLAP AT LEAST A SUBSTANTIAL POARTION OF THE REMAINDER OF THE END FACE OF SAID SILICA REGENERATOR DIVISION WALL SO THAT THE TWO SUBSTANTIALLY OVERLAP THE END FACE OF SAID DIVISION WALL, SAID CLAY END FACE WALLS HAVING THEIR ENDS SPACED FROM EACH OTHER TO FORM AN OPENING THEREBETWEEN, AND SEALING MEANS POSITIONED IN SAID OPENING BETWEEN SAID ENDS OF SAID CLAY FACE WALLS, SAID SEALING MEANS CONTACTING THE END FACE OF THE SILICA REGENERATOR DIVISION WALL TO SEAL OFF THE CORRESPONDING ENDS OF TH SIDE-BY-SIDE REGENERATOR CHAMBERS FROM EACH OTHER. 